Integrated process for protein, pigments, and biogas production from baker's yeast wastewater using filamentous fungi

Seyed Sajad Hashemi; Keikhosro Karimi; Mohammad J. Taherzadeh

doi:10.1016/j.biortech.2021.125356

Integrated process for protein, pigments, and biogas production from baker's yeast wastewater using filamentous fungi

Seyed Sajad Hashemi, Keikhosro Karimi, Mohammad J. Taherzadeh

Department of Bio-engineering Sciences

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

Baker's yeast production industry generates large quantities of high chemical oxygen demand (COD) wastewater. The integration of baker's yeast wastewater (BYW) for an innovative two-step waste biorefinery process by producing protein-rich fungal biomass and biogas along with COD and nutrients removal was the main object of the present research. In the first step, fungal biomass production from BYW was investigated using four species of filamentous fungi. The maximum biomass yield of 5.13 g/L BYW containing 43.8% mycoprotein and 36.3% COD removal was achieved by A. oryzae. In the second step, to produce biogas and further remove organic matter, the effluent of fungal fermentation was subjected to anaerobic digestion and COD removal between 22.4 and 44.2% was obtained. Overall, 1 m³ of BYW yielded 5.13 kg of protein-rich biomass and 1.42 m³ of methane. Additionally, pigment production using N. intermedia was investigated, and 1.54 mg carotenoids/g biomass was produced.

Original language	English
Article number	125356
Number of pages	10
Journal	Bioresource technology
Volume	337
DOIs	https://doi.org/10.1016/j.biortech.2021.125356
Publication status	Published - Oct 2021

Bibliographical note

Funding Information:
The authors are grateful for the financial support by the Iran National Science Foundation (INSF). The authors also wish to acknowledge Chaharmahal and Bakhtiari baker’s yeast Company (Iran) for providing the baker's yeast wastewater used in this study.

Publisher Copyright:
© 2021 The Authors

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

Baker's yeast wastewater
Biogas
Biorefinery
COD removal
Filamentous fungi

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title = "Integrated process for protein, pigments, and biogas production from baker's yeast wastewater using filamentous fungi",

abstract = "Baker's yeast production industry generates large quantities of high chemical oxygen demand (COD) wastewater. The integration of baker's yeast wastewater (BYW) for an innovative two-step waste biorefinery process by producing protein-rich fungal biomass and biogas along with COD and nutrients removal was the main object of the present research. In the first step, fungal biomass production from BYW was investigated using four species of filamentous fungi. The maximum biomass yield of 5.13 g/L BYW containing 43.8% mycoprotein and 36.3% COD removal was achieved by A. oryzae. In the second step, to produce biogas and further remove organic matter, the effluent of fungal fermentation was subjected to anaerobic digestion and COD removal between 22.4 and 44.2% was obtained. Overall, 1 m3 of BYW yielded 5.13 kg of protein-rich biomass and 1.42 m3 of methane. Additionally, pigment production using N. intermedia was investigated, and 1.54 mg carotenoids/g biomass was produced.",

keywords = "Baker's yeast wastewater, Biogas, Biorefinery, COD removal, Filamentous fungi",

author = "{Sajad Hashemi}, Seyed and Keikhosro Karimi and Taherzadeh, {Mohammad J.}",

note = "Funding Information: The authors are grateful for the financial support by the Iran National Science Foundation (INSF). The authors also wish to acknowledge Chaharmahal and Bakhtiari baker{\textquoteright}s yeast Company (Iran) for providing the baker's yeast wastewater used in this study. Publisher Copyright: {\textcopyright} 2021 The Authors Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

month = oct,

doi = "10.1016/j.biortech.2021.125356",

language = "English",

volume = "337",

journal = "Bioresource technology",

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AU - Taherzadeh, Mohammad J.

N1 - Funding Information: The authors are grateful for the financial support by the Iran National Science Foundation (INSF). The authors also wish to acknowledge Chaharmahal and Bakhtiari baker’s yeast Company (Iran) for providing the baker's yeast wastewater used in this study. Publisher Copyright: © 2021 The Authors Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/10

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N2 - Baker's yeast production industry generates large quantities of high chemical oxygen demand (COD) wastewater. The integration of baker's yeast wastewater (BYW) for an innovative two-step waste biorefinery process by producing protein-rich fungal biomass and biogas along with COD and nutrients removal was the main object of the present research. In the first step, fungal biomass production from BYW was investigated using four species of filamentous fungi. The maximum biomass yield of 5.13 g/L BYW containing 43.8% mycoprotein and 36.3% COD removal was achieved by A. oryzae. In the second step, to produce biogas and further remove organic matter, the effluent of fungal fermentation was subjected to anaerobic digestion and COD removal between 22.4 and 44.2% was obtained. Overall, 1 m3 of BYW yielded 5.13 kg of protein-rich biomass and 1.42 m3 of methane. Additionally, pigment production using N. intermedia was investigated, and 1.54 mg carotenoids/g biomass was produced.

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Integrated process for protein, pigments, and biogas production from baker's yeast wastewater using filamentous fungi

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